/Engine/Source/Editor/SkeletonEditor/Public/IEditableSkeleton.h
Set the parent of a socket
void SetSocketParent ( const [FName](API\Runtime\Core\UObject\FName) & SocketName, const [FName](API\Runtime\Core\UObject\FName) & NewParentName, [USkeletalMesh](API\Runtime\Engine\Engine\USkeletalMesh) * InSkeletalMesh )